Intraosseous device having retractable motor/stylet assembly and automatic stylet point cover upon retraction operation

Abstract

A portable and passive safety intraosseous device to allow for direct introduction of medications, etc., within the intermedullary space of a subject patient's bone or, if needed, the removal of certain substances from such a subject patient's bone. Such a device permits direct drilling and placement of a cannula within the subject bone with access external to the subject patient's skin, permitting, as well, connection of a tube for such introduction/removal purposes. The ability to provide a passive safety unit allows for facilitated utilization in, for instance, emergency situations with the entire device provided for utilization thereof. The device includes a drilling component with a permanently attached stylet and a removable cannula, a power supply for a single drilling operation, a mechanism to draw the stylet back into the drill component after use and disengagement from the cannula, and an automatic closure that activates with the separation of the cannula.

What is claimed is: 
     
         1 . An intraosseous drill device comprising a handle and a barrel having a closed end and an open end, said barrel further comprising an internally disposed integrated drill motor and stylet assembly, an external manual implement to initially move said integrated drill motor and stylet assembly towards said barrel opening, an internal implement to retract said integrated drill motor and stylet assembly towards the closed end of said barrel subsequent to movement thereof towards said barrel opening, and a cover for said stylet, wherein said cover for said stylet automatically covers said stylet upon retraction subsequent to manual movement of said integrated drill motor and stylet towards said barrel opening, wherein said retraction is operated through automatic action of said internal retraction implement. 
     
     
         2 . The intraosseous drill device further comprising a cannula implement temporarily connected with said stylet or said integrated drill motor and stylet assembly, wherein said cannula is configured to disengage from said stylet simultaneously with operation of said internal retraction implement. 
     
     
         3 . The device of  claim 1  further including a gearbox on said drill motor and stylet assembly. 
     
     
         4 . A method of introducing substances into and/or removing substances from a target intramedullary space of a bone utilizing the intraosseous drill device of  claim 2 , said method comprising the steps of:
 a) providing said device with said drill motor and stylet assembly and temporarily connected cannula manually moved to allow for said stylet and cannula to extend from said barrel opening for access to a patient's bone;   b) determining the properly located bone portion for introduction thereof said temporarily connected stylet and cannula of said device;   c) activating said device to drill said stylet and temporarily connected cannula therein until reaching the desired depth within the intermedullary space of said bone;   d) deactivating said drill once said depth is reached;   e) decoupling said stylet and said cannula, thereby activating said internal retraction implement and retracting said drill motor and stylet assembly within said barrel opening;   e) automatically activating said stylet cover to ensure contact with said stylet is prevented from a location external said barrel; and   f) utilizing said retained cannula for introduction or removal of said substances.